PT-2023-31620 · Unknown · Yii2-Authclient

Rhertogh · Published 2023-12-18 · Updated 2024-01-08 · CVE-2023-50714

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions yii2-authclient versions prior to 2.2.15

Description The Oauth2 PKCE implementation in yii2-authclient is vulnerable in two ways. First, the authCodeVerifier should be removed after usage, similar to authState. Second, there is a risk for a downgrade attack if PKCE is being relied on for CSRF protection.

Recommendations For versions prior to 2.2.15, update to version 2.2.15 to resolve the issue. As a temporary workaround, consider removing the authCodeVerifier after usage and avoid relying on PKCE for CSRF protection until a patch is applied.

Exploit

Fix

SSRF

Improper Verification of Cryptographic Signature

Improper Authentication

Weakness Enumeration

CWE-918

CWE-347

CWE-287

Related Identifiers

CVE-2023-50714

GHSA-RW54-6826-C8J5

Affected Products

Yii2-Authclient

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50714.json · Exploit
• 🔥 https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-rw54-6826-c8j5 · Exploit
• https://github.com/yiisoft/yii2-authclient/commit/721ed974bc44137437b0cdc8454e137fff8db213 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-50714 · Security Note
• https://osv.dev/vulnerability/GHSA-rw54-6826-c8j5 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-50714 · Vendor Advisory
• https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121 · Note
• https://github.com/yiisoft/yii2-authclient · Note
• https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420 · Note
• https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158 · Note
• https://t.me/cvenotify/66607 · Telegram Post